Praseodimium: Béda antara owahan

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Larik 104:
Like all rare earths, praseodymium is of low to moderate toxicity. Praseodymium has no known biological role.
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== ReferensiRujukan ==
<references/>
* [http://periodic.lanl.gov/elements/59.html Los Alamos National Laboratory – Praseodymium]